KR20170009093A

KR20170009093A - Matrix for detecting wearable bio-signal

Info

Publication number: KR20170009093A
Application number: KR1020150100539A
Authority: KR
Inventors: 김은구
Original assignee: (주)쿠도스
Priority date: 2015-07-15
Filing date: 2015-07-15
Publication date: 2017-01-25
Also published as: KR101763469B1

Abstract

The present invention relates to a non-contact type bio-signal measurement matrix that automatically measures and provides a bio-signal when a user lies on a matrix in which a fabric electrode is located. Since the intelligent matrix of the present invention uses the entire fabric of a large area as an electrode, even if an electrode is not attached to the body of a user, or if the movement of the body is big, a current can flow if the body is positioned above electrode fabrics. Therefore, the bio-signal can be received and transmitted continuously without interruption.

Description

[0001] Matrix for detecting wearable bio-signal [

The present invention relates to a non-contact bio-signal measurement matrix, and more particularly, to a non-contact bio-signal measurement matrix that automatically measures and provides a bio-signal when a user lies on a matrix in which a fabric electrode is inserted.

Patients with chronic illnesses, such as heart disease, need to continue to monitor their health condition, which leads to the inconvenience of having to visit the hospital directly, and the cost is too high.

Conventional sensors are disadvantageous in that the accuracy of heartbeat signal measurement is degraded if the contact points of the electrodes and the human body are out of order due to the user's movement, and they are mounted for a long time in the form of pressing the human body. These sensors are not suitable for continuous measurement in everyday life.

Korean Patent No. 10-0863064 discloses an apparatus for measuring a bio-signal equipped with an electrode. However, such clothes are integrally bonded to the inner surface of the garment so as to be in contact with the surface of the skin, Sensor. Therefore, since the signal measuring clothes of the above-mentioned patent are skin contact type, if the human body is moving, the signal containing a lot of operation sounds is detected and the accuracy is lowered.

Korean Patent Laid-Open Publication No. 10-2014-009809 discloses an article, a method and a system for detecting whether a heartbeat or an electrode is in good contact. The above-mentioned patent has an advantage that an electrode is attached to an underarm garment (fabric) and an elastic body is provided inside the electrode, so that it can be conveniently attached to the body. However, the user always attaches the electrode article, transmission line, There is an inconvenience in that it must be attached to the apparatus.

SUMMARY OF THE INVENTION [0006] The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a device capable of measuring a living body signal without wearing or attaching to the body.

An object of the present invention is to provide an apparatus for accurately detecting a living body signal even if there is movement of the body or contact with the skin.

The present invention provides an intelligent matrix for automatically detecting a living body signal when a user lies down on a matrix for sleeping.

According to one aspect of the present invention for achieving the above object,

Matrix with heat-resistant foam or latex;

Three electrode fabrics coated on the surface of the fabric with conductive particles and separated on the matrix; And

And a matrix cover covering the electrode fabric, wherein the three electrode fabrics correspond to a positive electrode, a negative electrode, and a ground electrode, respectively, so that when the user lies on the matrix, .

Since the intelligent matrix of the present invention uses the entire fabric of a wide area as an electrode, even if the body is not attached to the body of the user, and the body is moving, even if the body is positioned above the electrode fabrics, Therefore, the biological signal can be continuously received and transmitted without interruption.

The intelligent matrix of the present invention enables a high impedance of a non-contact type (clothes contact type) to be measured with high impedance matching of a module (sensor) first stage amplifier and a capacitance ECG of high accuracy.

Fig. 1 shows a super intelligent matrix which is an embodiment of the present invention.
2 is a block diagram of the bio-signal sensing module 40. As shown in FIG.
3 is a block diagram of the ultrasound noise cancellation compensating unit 41. As shown in Fig.
4 shows an electrocardiogram peak algorithm of the signal processing unit 42 of the present invention.
FIG. 5 shows the result of verifying the algorithm of FIG. 4 with the data of the MIT-BIH Arrhythmia Database.

Fig. 1 shows a super intelligent matrix which is an embodiment of the present invention. Referring to FIG. 1, the intelligent matrix of the present invention includes a matrix 10 and three electrode fabrics 20.

The matrix uses a non-spring-like matrix. The spring type matrix is affected by the metal spring, and the accuracy of signal reception is degraded.

In the present invention, a heat-resistant foam or a latex material is used as the matrix.

The three electrode fabrics 20 are coated with conductive particles on the surface of the fiber fabric and are separated and placed on the matrix.

The present invention includes a matrix cover (30) covering the electrode fabric to prevent direct contact between the electrode fabric and the body and to protect the electrode fabric.

The fiber fabric used in the present invention may be a fabric, a synthetic resin such as nylon, a nonwoven fabric, or the like, and it is preferable that the fabric is soft and excellent in ductility.

The conductive particles are coated on the fiber fabric to impart conductivity to the fiber fabric. The conductive particles may be any known conductive particles such as gold and silver. The conductive particles can be uniformly dispersed over the entire fabric.

In the present invention, three electrode fabrics are separated and positioned on the matrix so as to correspond to the (+) electrode, the (-) electrode, and the ground electrode, respectively.

In the present invention, the size or position of the fabric electrode can be appropriately adjusted so that the user's body extends over the (+) fabric electrode and the (-) fabric electrode on the matrix. For example, the fabric electrode may have a width of 5 to 45 cm, preferably 10 to 30 cm, and the gap therebetween may be 5 to 45 cm, preferably 10 to 30 cm. Also, for example, the presence of the fabric electrodes in the center of the matrix can maintain electrical contact with the body. For example, if a (+) fabric electrode 30 cm wide and a (-) fabric electrode are spaced apart from each other by 30 cm from the center of the matrix, the user's body may span between the fabric electrodes with almost no exception.

The intelligent matrix according to the present invention allows the current to be energized even when the user does not attach the electrode to the body of the user and further the body moves because the body of the user is over the electrode of the user despite the change of the posture of the user. Can be received and transmitted continuously.

The intelligent matrix may include a bio-signal sensing module (40) that amplifies the bio-signal received from the electrode fabric and removes noise.

The position of the bio-signal sensing module 40 is not particularly limited. For example, the bio-signal sensing module 40 may be fixed to a matrix frame. The bio-signal sensing module 40 may be connected to the fabric electrode through a transmission line, analyze bio-signals, measure heart rate, and transmit signal data to an external PC.

2 is a block diagram of the bio-signal sensing module 40. As shown in FIG. 2, the bio-signal sensing module 40 includes a first-stage noise cancellation compensating unit 41, a signal processing unit 42, a communication unit 43, and a power supply unit 44.

3 is a block diagram of the ultrasound noise cancellation compensating unit 41. As shown in Fig. Referring to FIG. 3, the ultrasound noise canceller 41 includes a capacitor and a resistor so as to have a high impedance at a signal input portion received from the cloth electrode. Since the first-stage noise cancellation compensator 41 has a higher initial impedance value than the skin direct contact type, the first-stage noise canceller compensates for the high impedance of the clothes to easily measure the user's bio-signal.

Meanwhile, the conventional electrocardiogram R-peak detection algorithm detects a peak by comparing it with a threshold value optimized for a signal obtained through an appropriate filtering process. However, when only a threshold value of the signal size is used, an erroneous peak In many cases, when measuring biological signals in a noncontact manner, various environmental restrictions may occur.

In order to solve this problem, the present invention proposes an electrocardiogram peak algorithm of the signal processing unit 42 as shown in FIG. The signal processing unit 42 can eliminate noise using the electrocardiogram peak algorithm of FIG. 4, and provide accurate real-time HR (Heart Rate Variability) / HRV (Heart Rate Variability) considering the peak of the time threshold value.

Referring to FIG. 4, the extinction peak detection algorithm used in the signal processing unit includes a mean interval estimation step, a divide segment step, a find maxima in segments step in each section, A step of calculating the heart rate from the obtained final local peak, a step of calculating the heart rate from the obtained final local peak, and a step of calculating the heart rate from the obtained final local peak.

As an implementation example, the electrocardiogram peak was extracted using the algorithm of FIG. 4 under the following conditions, and then the heart rate was extracted.

[Data Collection]

Data collection for peak detection was applied to non-overlapping data at 250 Hz, 4 seconds, 1000 samples, and peak detection every 4 seconds.

[Measurement of Mean Interval]

The CECG signal is composed of a harmonic component of the main frequency, and the main frequency of the CECG signal can extract heartbeat interval information of the measurement data when frequency analysis of the inverse number of the heartbeat interval (R-R interval), that is, the normal CECG signal. The heart rate per minute is fixed at 30bpm (beat per minute) and below 10bpm, which means 0.5Hz to 3.5Hz. Therefore, frequency analysis was performed only for 0.5 ~ 3.5Hz interval to estimate mean interval of measured data.

[Devide segment]

Based on the average gap information extracted earlier,

[Find maxima in segments]

Extract the maximum value in each divided interval

[Select valid point]

The envelope is extracted by connecting the maximum values of each section. The point at which the slope changes from + to is extracted as a candidate for the peak.

[Find local peak]

Based on the average interval information, the false positive peak was removed from the candidate group of the peak.

Next, local peaks were extracted through the process of removing the minimum peak among successive local peaks by comparing the interval between the local peaks with the average interval. The heart rate was extracted from the local peak.

FIG. 5 shows the result of verifying the algorithm of FIG. 4 with the data of the MIT-BIH Arrhythmia Database. Total beats of more than 100,000 showed 99.63% accuracy.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

10: matrix 20: fabric electrode
30: cover 40: biological signal sensing module

Claims

Matrix with heat-resistant foam or latex;
Three electrode fabrics coated with conductive particles on the surface of the fabric fabric and separated from the matrix fabric; And
And a matrix cover covering the electrode fabric, wherein the three electrode fabrics correspond to the (+) electrode, the (-) electrode and the ground electrode, respectively, and measure the living body signal in a noncontact manner when the user lies on the matrix An intelligent matrix.

2. The intelligent matrix of claim 1, wherein the size or position of the fabric electrode is controlled so that the user's body spans over the (+) fabric electrode and the (-) fabric electrode.

2. The intelligent matrix of claim 1, wherein the fabric electrodes are 5 to 45 cm wide and 5 to 45 cm apart.

2. The intelligent matrix of claim 1, wherein the intelligent matrix comprises a bio-signal sensing module for amplifying bio-signals received from the electrode fabric and removing noise.

4. The bio-signal sensing module according to claim 3, wherein the bio-signal sensing module includes a first stage noise elimination compensating unit at the module introduction unit, a signal processing unit for measuring a bio-signal at the rear end of the compensating unit, And a power supply unit for transmitting data processed by the signal processing unit to the power supply unit.